Takedown gun



masses.

TAKEDOWN GUN.l

To al? inkom it may concern:

Be it known that THOMAS C. JoHNsON, a citizen of the United States,residing at New Haven, in thecounty of New Haven.-

and State of Connecticut, have invented la new and useful Improvement inTakedown Guns; and I do hereby declare the following, when taken inconnection with the Vaccompanying drawings and the'characters ofreference marked thereon, to be a full, clear,

and exact description of the same, and which saidvdrawings constitutepart of this appli'- lcation, and represent, iii-'- `Figure v1, a viewin side elevation of a take-down gun embodying my invention.

Fig. 2, a broken view thereof partly in side elevation and partly invertical sec-` tion, showing its two main parts as put together andpositioned and locked Vby 'my improved frusto-conical,positioningaifid-Y locking screw;

Fig. 3, a detached broken view in sideele vation of the forward end ofthe receiver and butt-stock. i

F ig. 4, a corresponding yview of the rear end of the barrel andforearm.

Fig.V 5, a detached view in front elevation of the receiver-extension asit appears when stripped. i

F ig. 6, a side view thereof. Y

Fig. 7, a detached view of the frusto-conical positioning andlockingscrew.

My invention relates to an improvement 'in that class of take-down gunscomposed of two, separately organized, unitary struc tures or parts,adapted to be united for use and taken down-` or separated fortransportation, one of these parts comprising the receiver and itssystem and the other comprising the barrel and its appurtenances; theobject of my invention being to provide simple, reliable, and durablemeans for accurately positioning the unitary parts of the gun when thesame is put together. My invention is characterized by the fact that inYthe take-down mechanism the function of holding the two unitary parts ofthe .gun tospecification of Letters Patent. Patented Apr. l5, 19271'. uApplication ined may 22, i920." Y serii No. 383,353.

TEM om@ THOMAS C. JOHNSON, 0F NEW HAVEN, CONNECTICUT, ASSI'GNOR TOW'INCHESLILBR',V

With these .ends in'view, inventionVU consists in -a take-down''gunhaving certain details of construction and combinations of' parts aswill be hereinafter described and pointed out in the claims. l i n haveshown a two-part take-down gun comprising a receiver unit anda barrelunit, `as these parts may properly be designated. Thevreceiver unitcomprises'a receiverl 2, a

receiver-extension', a butt-stock 4, a trigger-guard 5, and a screw 6for connecting'` the guard to the rearwardly projecting cou*A Y Y l6()YForthe illustration ofmy invention, I

pling-lug Y7 of the receiver-extension; while i the barrelunit consistsofa-barrel 8 formed at its rear Aend 'with a concentric threaded stem 9and furnished with a depending forearm 10 which is secured :toiit inany-con-v venient manner. The said' receiver andbari rel unitscontain'other parts and appurtenances, which may Vhave'any desired formand have nothing to do with my present invention, which isV applicableI, to all .guns of substantially lthe type of the gunlhe'reinfillustrated.V The forward end of the receiver is internally threaded,asv shown in Fig. 2,

to receive the externally'threaded stem 9 of the ebarrel.y Theselcomplementary screwthreads have the function of holding the re-Yceiver-unit'` andthe barrel-unit'of the gun together when assembled'4for use `Vand -upon vextreme rear end ofthe barrel proper, I f locate arelatively deep frusto-conical posi- Y tioning and locking socket 11,which receives the frusto-conical positioning dowel-end 12 ofra screw 13having an intermediate stopshoulder 14 VVand a substantially cylindricalhead 15 separated from the said shoulder 14C by awide circumferentialgroovel for the `reception of a locking-pin 17 by means of ywhich thevsaid screw 13 is prevented from falling out from the lthreaded hole 18provided for the receptionof the said screw and entering the lower faceof the forward yportion of the receiver-extension 3.

In practice, the frusto-conical socket 11 and frusto-conical dowel-end12 of the Yscrew 13 will be so proportioned, relatively, that the upperend of the dowel-end screw will never come to a bearing Yupon the bottomof the socket during the useful life of the arm, whereby Ythe accuratepositioning of the two unitary parts of the gun is guaran-V teed to theuser. F or the reception of the substantially cylindrical head V15 ofthe screw, the lower face of the forward end of the receiver-extension 3is formed with aV straight-walled counters-bore 19 of sutlicient depthto permit the said head to gradually enter the bore as wear takes placebetween the said frusto-conical socket 11 and dowelend 12, and iscompensated for. Y

In putting the gun togetherVthe receiveri unit and the barrel-unit arescrewedV one into the other in the ordinary manner. This is purely amanual operation and, in the nature ofmanual operations, can never bedone exactly twice alike. y It is hardly con-V into exact alinement, inwhich they are` thereafter held. 'This rotation is, of course, a slightrotation, and will vary with each operation of the putting of the guntogether. Y y The shocks `'of recoil tending to pull the Y barrel andreceiver apart fall entirely upon their heavy. threads, which thusprotect the nose of the` take-down screw against any But it is easilywithin thel power ofV hammering, and hence from any deformation. Y

lVithout going further into the details of the gun herein shown, it maybe `described as a take-down gun of the type illustrated in iny priorPatent, No. 1,163,156 of December 7th, 1915. Y

claim: Y

Ina take-down gun having a receivenunit and a barrel-unit, thecombination with a receiver provided at its forward end with a threadedopening and a depending abutment-lug, and a' barrel provided at its rearend with a threaded shank Vadapted to be screwed into the said receiver,and also provided with an integral collar located immediately in frontof the said'shank and formed Vwith a'frusto-conical recess; of atake-down vScrew mounted in lthe said abut ment-lug and provided with afrusto-conical nose adapted to enter the said frusto-conical recess,whereby after the receiver and barrel units have been manually screwedtogether and while the said take-down screw is being turned home, thewedge-like action of its frusto-conical nose upon theside walls of thefrusto-conical recess will relatively rotate the barrel andreceiver-units until they are brought into predetermined relativeposition, and whereby the threads of the receiver and barrel take theshocks of recoil and protect the said nose of the take-down screw fromdeformation thereby. t

In testimony whereof I havesigned this specification inthe presence oftwo subscribing witnesses. Y

THOMAS i O. JOHNSON.

